const {createServer} = require('http');
const {parse} = require('url');
const next = require('next');

const dev = process.env.NODE_ENV !== 'production';
const app = next({dev});
const handle = app.getRequestHandler();

app.prepare().then(() => {
  createServer((req, res) => {
    // Be sure to pass `true` as the second argument to `url.parse`.
    // This tells it to parse the query portion of the URL.
    const parsedUrl = parse(req.url, true);
    const {pathname, query} = parsedUrl;

    if (pathname === '/a') {
      app.render(req, res, '/b', query); // emmm app.render意思是渲染pages下的哪个页面(虽然编辑提示是pathname,但其实是pages下文件的名字)
    } else if (pathname === '/b') {
      app.render(req, res, '/a', query);
    } else {
      handle(req, res, parsedUrl)
    }
  }).listen(3000, err => {
    if (err) throw err;
    console.log('> Ready on http://localhost:3000')
  })
});
